I have one, not a huge issue because...
The white out in DI
will only occur if using the scroll @ 2 & sharpness enabled - bump up your screen scroll rate to 3 and it goes away OR turn OFF the DI enhance "sharpness" (or both).
Tuning the unit with just sens. & contrast will get you the same results that you would get using "Sharpness" as the newest S/W works pretty well - I don't use 2D much but running a scroll rate of 4 and
dual beam gives pretty fair 2D IMO. Most guys complain about the dual beam - and I like it better than the 200KHz which is the worst for me. I use SI/DI far more than 2D - but if you want the best 2D your machine can provide a "work around" is to set the XDCR type to "Dual Beam" or "US/2" on the XDCR selection menu, the processor isn't polling the SI/DI section so more processing power is available for smoother 2D.
HTH~ Robert